Impeller-type washing machine

ABSTRACT

An impeller-type washing machine comprises a box body, an outer tub and an inner tub, the outer tub is arranged in the box body, the inner tub is installed in the outer tub, an upper part of the outer tub is fixedly connected with the box body, a damping device configured to reduce vibration of the outer tub is arranged below the outer tub in the box body, an upper edge of the outer tub is fixedly connected with an upper part of the box body, and there is a space between a side wall of the outer tub and an inner wall of the box body. A space between the outer tub and the box body is reduced, and effective washing volume of a washing machine is increased; meanwhile, vibration of a washing machine is reduced, and a better damping effect is achieved.

TECHNICAL FIELD

The present disclosure belongs to the field of a washing machine, in particular to an impeller-type washing machine.

BACKGROUND

A full-automatic impeller-type washing machine is composed of an inner tub, a bucket and an outer box body, wherein the inner tub can be concentrically sleeved with the bucket in a relatively rotating manner. The bucket is installed in the outer box body actively through a hanger, a bottom of the bucket is installed and connected with a decelerating clutch, configured to drive washing and dehydration of clothes, via a screw. A motor is installed on the decelerating clutch eccentrically. An output shaft of the motor is installed with a belt wheel, and the motor is connected with an input end of the decelerating clutch through a belt. A washing machine of this structure is complex in structure, large in noise, low in efficiency and high in cost. Certain spacing should be reserved between an inner tub and the bucket, and certain spacing should be reserved between a bucket and a box body. Due to existence of such components as a hanger, the spatial size required between the bucket and the box body is relatively large, thereby leading to a relatively small effective washing volume.

At present, a washing machine which is driven coaxially has been researched in some technologies. A motor, a decelerating clutch structure, a washing dehydration bucket and an impeller are all installed coaxially, so as to save space and materials, and such a structure needs a favorable damping technique. A Chinese patent with an application number of CN201510490741.7 discloses a full-automatic washing machine which is driven coaxially. In this machine, no bucket is available, only a box body which is closed at a bottom serves the task of a bucket. A motor, a decelerating clutch structure, a washing dehydration bucket and an impeller are all installed coaxially. A Chinese patent with an application number of CN201520859714.8 discloses an impeller-type full-automatic washing machine which includes a top cover, a box body and an inner tub, an annular rib is arranged on a bottom surface of the inner tub, the whole inner tub is installed and supported on a decelerating clutch driving device via a bottom of an inner tub, an upper part of the decelerating clutch driving device penetrates through a bottom part of the inner tub and is provided with an impeller in an active manner. A base is connected with a lower part of a box body which has a water accommodation function, The decelerating clutch driving device penetrates through the box body in a sealed manner and is installed on the base through a supporting damping spring. A drainage port is arranged at the bottom of the box body, and the drainage port is communicated with a drainage pipe, which penetrates through the base, via a drainage valve.

In the above two technologies, a bucket is removed, and a box body is adopted as a bucket, thereby saving a certain space and cost, however, the box body is square, and a washing and dehydration bucket is cylindrical, the space between the two is overlarge, then a large amount of washing water is wasted. Meanwhile, the damping devices in the two solutions are both vertical supporting damping springs which are arranged on the base. It can only slow the vibration in the axial direction of the washing machine and cannot slow the vibration of the left and right of the washing machine.

In view of this, the present disclosure is hereby proposed.

SUMMARY

The technical problem to be solved in the present disclosure is to overcome shortcomings of the prior art, and provide an impeller-type washing machine. An upper edge of an outer tub of the washing machine is fixedly connected with a box body, so as to reduce a space between the outer tub and the box body, and further enlarge effective washing volume of the washing machine. Multiple damping devices are arranged on a decelerating clutch device and a motor at the bottom of an outer tub, and can act collaboratively to reduce vibration of the washing machine, and achieve a better damping effect. The impeller-type washing machine in the present disclosure is large in effective washing volume, energy saving, water saving, low in noise, low in cost and favorable in damping effect.

In order to solve the above technical problem, basic conceptions of the technical solution adopted in the present disclosure are as follows:

An object of the present disclosure is to provide an impeller-type washing machine, including a box body, an outer tub and an inner tub, wherein the outer tub is arranged inside the box body, the inner tub is installed in the outer tub, an upper part of the outer tub is fixedly connected with the box body, and a damping device configured to reduce vibration of the outer tub is arranged below the outer tub in the box body.

In a further solution, an upper edge of the outer tub is fixedly connected with an upper part of the box body, and there is a space between a side wall of the outer tub and an inner wall of the box body.

In a further solution, an upper edge of the outer tub is turned outwards to form a folding part, and the folding part covers an upper end part of the box body and is fixedly connected with the upper end part of the box body;

preferably, the folding part is in fixed and riveted connection with the box body.

In a further solution, the folding part includes a horizontal part formed through the upper edge of the outer tub and extending horizontally toward the box body, and the horizontal part is used for spacing the side wall of the outer tub from the inner wall of the box body.

In a further solution, the folding part further includes a vertical part formed through the horizontal part extending to the outside of the box body and extending vertically downward;

preferably, a side wall of the upper part of the box body is provided with an annular convex rib which protruding outwards, and an end part of the vertical part is abutted against the annular convex rib.

In a further solution, a panel seat of the impeller-type washing machine is fixedly installed on the box body, and the upper edge of the outer tub is fixed between the panel seat and the box body;

preferably, an edge of the panel seat covers the folding part of the outer tub and is abutted against the annular convex rib of the box body.

In a further solution, the box body includes a fixed support configured to increase strength of the box body, and the upper edge of the outer tub is fixed on the fixed support;

preferably, the fixed support is provided with a groove at a position tangential to the outer tub for matching with the upper edge of the outer tub. In a further solution, a motor is arranged at a bottom inside the box body, and the damping device includes a first damping device arranged on the motor.

In a further solution, the first damping device is a damping spring, one end of the damping spring is fixedly connected with a stator of the motor, and another end of the damping spring is fixedly connected onto a bottom wall of the box body;

preferably, at least two damping springs are arranged, an annular plate is arranged around a periphery of the stator of the motor, the damping springs are installed on the annular plate, and are uniformly distributed in one circumference centered on an axis of the motor. In a further solution, a motor is arranged at a bottom inside the box body, a decelerating clutch device is arranged above the motor, and the damping device further includes a second damping device arranged at the decelerating clutch device or at the bottom of the outer tub.

In a further solution, the second damping device includes an installation plate and a damper, wherein the installation plate is fixedly connected with the decelerating clutch device, one end of the damper is rotatably connected with the installation plate, and another end of the damper is rotatably connected with the bottom of the box body;

preferably, two ends of the damper are respectively in hinged connection with the installation plate and the bottom part of the box body; and

preferably, at least two dampers are arranged, and are uniformly installed on a circumference centered on an axis of the decelerating clutch device. After the above technical solution is adopted, compared with the prior art, the present disclosure has the following beneficial effects:

1. As to the impeller-type washing machine of the present disclosure, such damping devices as a hanger between the outer tub and the box body are removed, thereby greatly saving the space between the outer tub and the box body. An upper edge of the outer tub is turned outwards, the folding part is directly or indirectly fixed on the box body, and a proper anti-hitting space is reserved between the inner tub and the box body. The connection between the inner tub and the box body in this way greatly saves space inside the washing machine, reserves more space to increase washing volume, also reserves a proper space to prevent hitting, and can save energy and water simultaneously.

2. As to the impeller-type washing machine of the present disclosure, a motor and a decelerating clutch device configured to drive washing and dehydration of the inner tub are arranged between bottom of the outer tub and bottom of the box body. The motor and the decelerating clutch device are respectively provided with a damping device, and the damping device is fixedly connected with the bottom of a box body. The damping devices include a first damping device and a second damping device, and are arranged on a circumference which takes an axis of an outer tub as a center. The first damping device and the second damping device act collaboratively, to achieve the damping effect, the noise is small, and the operation is stable.

3. As to the impeller-type washing machine of the present disclosure, an inner tub adopts a holeless inner tub, only a dehydration hole is set at an upper part of an inner tub, no washing water exists between the inner tub and the outer tub, thereby featuring by water saving. During a drainage and/or dehydration process, a first drainage port is opened, most of the water and sediments are discharged to the outer tub via the first drainage port at the bottom, while water in clothes is drained to the outer tub from a dehydration hole at an upper part of an inner tub during high-speed rotation of an inner tub to dehydrate, and is directly drained outside a washing machine via a second drainage port and a drainage pipe at the bottom of an outer tub, therefore, drainage is rapid and drainage and pollution discharge effects are favorable.

4. As to the impeller-type washing machine of the present disclosure, a locking mechanism is arranged at the bottom of the inner tub, the locking mechanism performs positioning locking on an inner tub, and drains away water through opening and closing of a valve plug, the drainage is rapid and water leakage is prevented.

A further detailed description will be given below on specific embodiments of the present disclosure in combination with accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

As a part of the present disclosure, accompanying drawings are used for providing further understanding of the present disclosure. Exemplary embodiments of the present disclosure and descriptions thereof are used for explaining the present disclosure, rather than constituting an improper limitation to the present disclosure. Apparently, the accompanying drawings described below are merely some embodiments, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort. In the figures:

FIG. 1 is a structural schematic diagram of an impeller-type washing machine in the present disclosure;

FIG. 2 is a partial enlarged view of region A in FIG. 1;

FIG. 3 is a structural schematic diagram of a fixed support in the present disclosure.

Reference numerals in the figures: 1 box body, 2 outer tub, 3 inner tub, 4 panel seat, 5 folding part, 6 horizontal part, 7 vertical part, 8 annular convex rib, 9 decelerating clutch device, 10 first damping device, 11 installation plate, 12 damper, 13 second damping device, 14 motor, 15 stator, 16 annular plate, 17 dehydration hole, 18 impeller, 19 locking mechanism, 20 valve plug, 21 first drainage port, 22 second drainage port, 23 drainage pipe, 24 gap, 25 fixed support.

It should be noted that, these drawings and text descriptions are not aiming at limiting a conception scope of the present disclosure in any form, but to describe concepts of the present disclosure for those skilled in the art through referring to specific embodiments.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make the object, technical solutions and advantages of the embodiments of the present disclosure clearer, a clear and complete description will be given below on technical solutions in the embodiments in combination with accompanying drawings in the embodiments of the present disclosure. The following embodiments are used for describing the present disclosure, rather than for limiting the scope of the present disclosure.

In the description of the present disclosure, it should be noted that, the orientation or positional relationship indicated by such terms as “up”, “down”, “front”, “rear”, “left”, “right”, “vertical”, “inner” and “outer” is the orientation or positional relationship based on the accompanying drawings. Such terms are merely for the convenience of description of the present disclosure and simplified description, rather than indicating or implying that the device or element referred to must be located in a certain orientation or must be constructed or operated in a certain orientation, thereby the terms cannot be understood as a limitation to the present disclosure.

In the description of the present disclosure, it should be noted that, unless otherwise stipulated and defined definitely, such terms as “installed”, “connected” and “in connection” should be understood in their broad sense, e.g., the connection can be a fixed connection, a detachable connection or an integral connection; can be mechanical connection or electrical connection; can be direct connection or can be indirect connection through an intermediate. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific conditions.

Embodiment 1

As shown in FIG. 1 to FIG. 3, an object of the present disclosure is to provide an impeller-type washing machine, including a box body 1, an outer tub 2 and an inner tub 3, wherein the outer tub 2 is arranged inside the box body 1, the inner tub 3 is installed in the outer tub 2, an upper part of the outer tub 2 is fixedly connected with the box body 1, and a damping device configured to reduce vibration of the outer tub 2 is arranged below the outer tub 2 in the box body 1.

The impeller-type washing machine in the present disclosure includes the box body 1, the outer tub 2 and the inner tub 3, and the outer tub 2 is arranged in the box body 1, the inner tub 3 is installed in the outer tub 2. And the outer tub, the box body and the inner tub can be arranged to be coaxial. A hanger damping component which is installed on traditional impeller-type washing machines is omitted between the box body 1 and the outer tub 2. An upper part of the outer tub 2 is fixedly connected with the box body 1, and a damping device is set in the box body 1 below the bottom of the outer tub 2, thereby not only greatly saving a space between the outer tub 2 and the box body 1, reserving more space for installing an inner tub 3, increasing actual washing volume, but also achieving the purpose of slowing down vibration of an outer tub 2.

A box body 1 of the present disclosure forms an appearance of an impeller-type washing machine, can be manufactured into a box body 1 which is both square-shaped inside and outside, and can also be manufactured into a box body 1 which is square in an external contour and cylindrical inside. The outer tub 2 can be set to be cylindrical, and can also be made into an oval-like irregular shape, so as to possibly reduce the gap between the box body 1 and the outer tub 2. The inner tub 3 of an impeller-type washing machine can be a holeless inner tub 3, and can also be an ordinary perforated inner tub 3. When both the inner wall and the outer wall of the box body 1 are square, the outer tub 2 can be manufactured into an irregular shape which is possibly close to each side wall of the box body 1. When the interior of the box body 1 is cylindrical, the outer tub 2 can be set to be cylindrical.

An upper part of the outer tub 2 can be directly fixedly connected with a box body 1, for example, a side wall or an edge of the outer tub 2 extends outwards and is fixedly connected with the box body 1. Or an upper part of the outer tub 2 can be indirectly and fixedly connected with the box body 1, for example can be fixedly connected with a box body 1 through a fixed connecting rod or a fixed connecting plate. The box body 1 and the outer tub 2 can be fixedly connected in multiple manners, for example, bolted connection, riveted connection, welding, etc., as long as fixed connection between an upper part of the outer tub 2 and a box body 1 is realized, and a certain gap 24 is reserved.

A motor 14 and a decelerating clutch device 9 which are configured to drive rotation of the inner tub 3 and the impeller 18 of a washing machine and realize functions of washing and dehydration are arranged between the position below the bottom of the outer tub 2 and a bottom wall of the box body 1. The motor 14 is installed at the bottom of the box body 1, the decelerating clutch device 9 is installed above the motor 14 and is in shaft connection with the motor 14. An output shaft of the decelerating clutch device 9 penetrates through the bottom of the outer tub 2 and is connected with the inner tub 3 and the impeller 18. The damping device is arranged in the box body 1 below the outer tub 2, and can be directly arranged on an outer bottom wall of the outer tub 2, can also be arranged on the decelerating clutch device 9, or arranged on the motor 14, or multiple damping devices can be arranged at multiple positions. One or more types of damping devices can be arranged in the present disclosure, for example, a damping spring, a damper 12 or a shock pad, etc. Multiple damping devices play a role of collaborative damping, and achieve a better damping effect.

In a further solution, an upper edge of the outer tub 2 is fixedly connected with an upper part of the box body 1, and there is a space between a side wall of the outer tub 2 and an inner wall of the box body 1.

The upper edge of the outer tub 2 is fixedly connected with the upper part of the box body 1, the gap 24 is formed between the side wall of the outer tub 2 and the inner wall of the box body 1, to reserve a proper anti-hitting space, and avoid the outer tub 2 from hitting against the box body 1. When a fixed connection mode between the upper edge of the outer tub 2 and the upper part of the box body 1 is adopted, processing of the outer tub 2 is facilitated, and installation and fixation of the outer tub 2 and the box body 1 are also facilitated, such that the gap 24 is formed between the side wall of the entire outer tub 2 and the inner wall of the box body 1, to prevent hitting. An upper edge of the outer tub 2 and an upper part of the box body 1 can be fixedly connected in multiple manners: for example, the upper edge of the outer tub 2 extends outwards to the upper edge of the box body 1, and is fixedly connected with the upper edge of the box body 1; or the upper edge of the outer tub 2 extends outwards and covers the upper part of the box body 1 and is fixedly connected with the side wall of the box body 1. As long as fixation between the upper edge of the outer tub 2 and the box body 1 is realized and the gap 24 for preventing hitting is formed, any manner can be adopted.

In a still further solution, the upper edge of the outer tub 2 is turned outwards to form a folding part 5, the folding part 5 covers the upper end part of the box body 1 and is fixedly connected with the upper end part of the box body 1; preferably, the folding part 5 is in fixed and riveted connection with the box body 1.

In the present solution, the upper edge of an outer tub 2 is flanged outwards to form a folding part 5, and the folding part 5 covers the upper end part of the box body 1 and is fixedly connected with the box body 1. When the outer tub 2 of this manner is assembled, the folding part 5 can be hanged on the box body 1, and the folding part 5 can cover the upper end part of the whole box body 1, and can also cover the position at which the box body 1 is tangent with the outer tub 2, and then a rivet or a bolt is utilized for connection in a horizontal direction. As to such a fixation manner between the outer tub 2 and the box body 1, supporting points of forces are multiple, the fixed effect is favorable, deformation and damage are not easily happened, and installation or disassembly is convenient during use.

Embodiment 2

As shown in FIG. 1 to FIG. 3, an upper edge of the outer tub 2 of the present embodiment is turned outwards to form a folding part 5, and the folding part 5 includes a horizontal part 6 which is formed through horizontal extension of an upper edge of an outer tub 2 towards a box body 1 and there is a space between the side wall of the outer tub 2 and the inner wall of the box body 1.

The outer tub 2 is arranged in the box body 1, a horizontal part 6 at an upper edge of the outer tub 2 is formed through horizontal extension of the upper edge of the outer tub 2 towards the direction of a corresponding box body 1, and the horizontal part 6 is arranged horizontally between the outer tub 2 and the box body 1, to form a gap 24 between the outer tub 2 and the box body 1, so as to avoid the outer tub 2 from hitting against the box body 1.

As a further limitation, the folding part 5 further includes a vertical part 7 which is formed through vertical extension downwards of the horizontal part 6 after the horizontal part 6 extends outside the box body 1.

The horizontal part 6 of the outer tub 2 extends horizontally to the outer side of the box body 1 at a corresponding position. After the horizontal part 6 is flush with the outer wall of the box body 1, the horizontal part 6 bends downwards vertically and extends, to form a vertical part 7. In this way, while a horizontal part 6 can form a gap 24 to prevent hitting, a connecting part between the vertical part 7 and the horizontal part 6 can be abutted against an upper edge of the box body 1, the vertical part 7 covers the upper end of the box body 1, and fixes the vertical part 7 and a side wall of the box body 1 by utilizing a rivet or a bolt, thereby achieving a favorable fixed effect.

As a further limitation, a side wall of the upper part of the box body 1 is provided with an annular convex rib 8 which protrudes outwards, and an end part of the vertical part 7 is abutted against the annular convex rib 8.

An annular convex rib 8 at the upper part of a box body 1 can be formed through outward protruding of a side wall of a box body 1, and can also be an annular convex rib 8 which is fixedly connected on an upper end of a box body 1. The vertical part 7 at the upper edge of the outer tub 2 is close to the outer side wall of the box body 1, and the end part is abutted against the annular convex rib 8, in this way, on the one hand, another supporting point is provided for the fixation of an outer tub 2 on the box body 1, to disperse forces and increase the stability effect, and on the other hand, the vertical part 7 and the box body 1 can form a smooth plane, to avoid scratch and increase beauty.

In a further solution, a panel seat 4 of the impeller-type washing machine is fixedly installed on the box body 1, and the upper edge of the outer tub 2 is fixed between the panel seat 4 and the box body 1.

During assembly, the outer tub 2 is arranged in the box body 1, the folding part 5 of the upper edge of the outer tub 2 covers the upper end of the box body 1, at this time, the vertical part 7 and the box body 1 can be fixed in a riveted manner. The panel seat 4 of the washing machine is installed above the box body 1, therefore, the edge of the panel seat 4 covers the folding part 5 of the upper edge of the outer tub 2, and then the panel seat 4 is fixed with the box body 1 and the outer tub 2 in a riveted manner. In this way, the upper edge of the outer tub 2 is fixed and hidden between the panel seat 4 and the box body 1, and will not be taken off, and the fixed effect between the outer tub 2 and the box body 1 is further enhanced.

As a further limitation to the present solution, an edge of the panel seat 4 covers thefolding part 5 of the outer tub 2 and is abutted against the annular convex rib 8 of the box body 1. The width of the upper surface of the annular convex rib 8 is equal to a sum of a thickness of the vertical part 7 of the outer tub 2 and a thickness of the edge of the panel seat 4. After the panel seat 4 is arranged on the box body 1, the panel seat 4 completely covers the vertical part 7 and is abutted against the annular convex rib 8 simultaneously, to form a beautiful appearance, increase supporting points and enhance a fixed effect.

Embodiment 3

As shown in FIG. 1, the present embodiment is a further limitation to embodiment 1 or embodiment 2. A motor 14 is arranged at bottom of the box body 1, a decelerating clutch device 9 is arranged above the motor 14, and the decelerating clutch device 9 is fixed at the bottom of the outer tub 2. An output shaft of the decelerating clutch device 9 penetrates through the bottom of an inner tub 3 and is connected with an impeller 18 of the washing machine.

A damping device configured to reduce vibration of the outer tub 2 is set below theouter tub 2 in the box body 1. The damping device includes a first damping device 10 arranged on themotor 14. The first damping device 10 is a damping spring, the damping spring is vertically set, one end of the damping spring is fixedly connected with a stator 15 of the motor 14, and the other end is fixedly connected on a bottom wall of the box body 1.

When the motor 14 works, the damping spring can reduce vibration of the motor 14 caused by rotation of a shaft. Preferably, at least two damping springs are arranged, an annular plate 16 is arranged around the periphery of the stator 15 of the motor 14, the damping springs are installed on an annular plate 16, and uniformly distributed on a circumference which takes an axis of a motor 14 as a center. The damping springs are symmetrically arranged on one circumference, and four, six or eight damping springs can be arranged to disperse forces, and achieve a favorable damping effect.

In a further solution, the damping device further includes a second damping device 13 which is arranged at the decelerating clutch device 9 or the bottom of the outer tub 2. The second damping device 13 includes an installation plate 11 and a damper 12, the installation plate 11 is fixedly connected with the decelerating clutch device 9, one end of the damper 12 is rotatably connected with the installation plate 11, and the other end of the damping spring is rotatably connected with the bottom part of the box body 1.

The decelerating clutch device 9 can be a decelerating clutch. The center of the installation plate 11 is sleeved and fixed on a housing or a bearing seat of the decelerating clutch, one end of the damper 12 is in hinged connection with the installation plate 11, the other end of the damper 12 is in hinged connection with the bottom of the box body 1, or is in hinged connection with a base arranged at the bottom of the box body 1.

As a further limitation, at least two dampers 12 are arranged, and the dampers are uniformly installed on a circumference which takes an axis of a decelerating clutch device 9 or an installation plate 11 as a center. The dampers 12 are installed in pairs and are symmetrically arranged, and are uniformly distributed on one circumference of an installation plate 11, to disperse forces and achieve a favorable damping effect.

The first damping device 10 and the second damping device 13 of the present embodiment can be set on a circumference with identical or different diameters which takes an axis of a decelerating clutch device 9 or a motor 14 as a center, and the damper 12 and the damping spring can act collaboratively, to perform multiple damping and achieve a better damping effect. Preferably, the damper 12 and the damping spring are set on different circumferences, to disperse force in a larger scope, and achieve a better damping effect.

Embodiment 4

As shown in FIG. 1, the present embodiment is a further limitation to embodiment 1 or embodiment 2 or embodiment 3. An inner tub 3 of the present embodiment is a holeless inner tub 3 which is only provided with a row of dehydration holes 17 on the upper part. A balanced ring is set above the inner tub 3. The bottom of the inner tub 3 is provided with a first drainage port 21 configured to drain away water and a locking hole which is configured to lock an inner tub 3 and which is not communicated with the inner tub 3. The bottom of the outer tub 2 is provided with a locking mechanism 19, a second drainage port 22 configured to drain away water, and a drainage control structure configured to control opening/closing of the first drainage port 21.

A drainage control structure includes a stretchable valve plug 20. The valve plug 20 is fixed on a circumferential direction, when the valve plug 20 moves upwards and covers the first drainage port 21, the valve plug 20 controls the first drainage port 21 to close, and when the valve plug 20 moves downwards and takes off from the first drainage port 21, the valve plug 20 controls the first drainage port 21 to open. A locking mechanism 19 includes a stretchable locking rod, and the locking rod is fixed on a circumferential direction. During washing and rinsing, the locking rod moves upwards and stretches into a locking hole, the inner tub 3 is locked and cannot rotate, meanwhile, the first drainage port 21 is closed; during dehydration, the locking rod moves downwards and takes off from the locking hole, the inner tub 3 can rotate in a circumferential direction, so as to dehydrate inner clothes.

During washing, the first drainage port 21 is closed, water only exists in an inner tub 3, and no water exists between an inner tub 3 and an outer tub 2. After washing is finished, the first drainage port 21 is opened, and most of the water is drained away from the first drainage port 21. During dehydration, the inner tub 3 rotates, water dehydrated from clothes rises along a tub wall under the effect of a centrifugal force, is drained out of the inner tub 3 to the space between the inner tub 3 and the outer tub 2 through a dehydration hole 17 on the upper part of the inner tub 3, and then is drained away via a second drainage port 22 of an outer tub 2. When clothes are washed in this way, the washing water is only saved in an inner tub 3, no washing water exists between the inner tub 3 and the outer tub 2, thereby featuring by water saving. During a drainage and/or dehydration process, the first drainage port 21 is opened, most of water, silt and particles and other sediments are drained away to the outer tub 2 via a first drainage port 21 at the lower part, while water in clothes is drained to an outer tub 2 via a dehydration hole 17 at the upper part of the inner tub 3 when the inner tub 3 rotates at a high speed for dehydration, and is directly drained out of a washing machine via a second drainage port 22 and a drainage pipe 23 at the bottom of an outer tub 2, therefore, rapid drainage is realized, and the drainage and pollution discharge effects are favorable.

Embodiment 5

As shown in FIG. 3, the present embodiment differs from embodiment 2 as follows: a box body 1 of an impeller-type 18 washing machine of the present embodiment includes a fixed support 25 for increasing strength of the box body 1, and an upper edge of the outer tub 2 in the box body 1 is fixed on a fixed support 25. The fixed support 25 has better rigidity, and can better bear weights of an outer tub 2 and an inner tub 3, and the fixed support is favorable in fixed effect and is not easy to deform.

The fixed support 25 can be a square fixed support 25, and can also be a cylindrical fixed support 25. The fixed support 25 is arranged inside a box body 1, can be integrated with the box body 1, and can also be in fixed connection with the box body 1. When the fixed support 25 is a square fixed support 25, an upper edge of the outer tub 2 is flanged outwards to form a folding part 5, and the folding part 5 covers a part at which the fixed support 25 is tangent with the outer tub 2. The folding part 5 is in fixed and riveted connection with the fixed support 25 after covering the fixed support 25.

In a further solution, a fixed support 25 is provided with a groove which is in match with an upper edge of an outer tub 2. The folding part 5 of the upper edge of an outer tub 2 is inserted into a groove and is fixedly connected with a fixed support 25. Through such a manner, a connecting position can be hidden inside a washing machine, to ensure beauty while ensuring the effect of fixed connection.

Solutions of the above embodiments can be implemented separately, and can also be implemented in any arbitrary combination. The embodiments above are merely preferred embodiments of the present disclosure, rather than a limitation to the present disclosure in any form. Although the present disclosure has been disclosed above with preferred embodiments, however, the preferred embodiments are not used for limiting the present disclosure. Under a premise of not departing from a scope of the technical solutions of the present disclosure, those skilled in the art can utilize technical contents enlightened above to make a few changes or modify to equivalent embodiments with equivalent changes. The contents not departing from technical solutions of the present disclosure and any simple modifications, equivalent changes and modifications made to the above embodiments based on technical essences of the present disclosure still all belong to the scope of solutions of the present disclosure. 

1. An impeller-type washing machine, comprising a box body, an outer tub and an inner tub, wherein, the outer tub is arranged inside the box body, the inner tub is installed in the outer tub, an upper part of the outer tub is fixedly connected with the box body, and a damping device configured to reduce vibration of the outer tub is arranged below the outer tub in the box body.
 2. The impeller-type washing machine according to claim 1, wherein an upper edge of the outer tub is fixedly connected with an upper part of the box body, and there is a space between a side wall of the outer tub and an inner wall of the box body.
 3. The impeller-type washing machine according to claim 2, wherein the upper edge of the outer tub is turned outwards to form a folding part, and the folding part covers an upper end part of the box body and is fixedly connected with the upper end part of the box body,
 4. The impeller-type washing machine according to claim 3, wherein the folding part comprises a horizontal part formed by the upper edge of the outer tub and extending horizontally toward the box body, and the horizontal part is used for spacing the side wall of the outer tub from the inner wall of the box body.
 5. The impeller-type washing machine according to claim 4, wherein the folding part further comprises a vertical part extending vertically downward from the horizontal part, and the vertical part is located outside of the box body.
 6. The impeller-type washing machine according to claim 5, wherein a panel seat of the impeller-type washing machine is fixedly installed on the box body, and the upper edge of the outer tub is fixed between the panel seat and the box body.
 7. The impeller-type washing machine of any according to claim 2, wherein the box body comprises a fixed support configured to increase strength of the box body, and the upper edge of the outer tub is fixed on the fixed support.
 8. The impeller-type washing machine according to claim 1, wherein a motor is arranged at a bottom inside the box body, and the damping device comprises a first damping device arranged on the motor.
 9. The impeller-type washing machine according to claim 8, wherein the first damping device is a damping spring, one end of the damping spring is fixedly connected with a stator of the motor, and another end of the damping spring is fixedly connected onto a bottom wall of the box body.
 10. The impeller-type washing machine according to claim 1, wherein a motor is arranged at a bottom inside the box body, a decelerating clutch device is arranged above the motor, and the damping device further comprises a second damping device arranged at the decelerating clutch device or at the bottom of the outer tub.
 11. The impeller-type washing machine according to claim 10, wherein the second damping device comprises an installation plate and a damper, the installation plate is fixedly connected with the decelerating clutch device, one end of the damper is rotatably connected with the installation plate, and another end of the damper is rotatably connected with the bottom of the box body.
 12. The impeller-type washing machine according to claim 3, wherein the folding part is in fixed and riveted connection with the box body.
 13. The impeller-type washing machine according to claim 5, wherein a side wall of the upper part of the box body is provided with an annular convex rib protruding outwards, and an end part of the vertical part is abutted against the annular convex rib.
 14. The impeller-type washing machine according to claim 6, wherein an edge of the panel seat covers the folding part of the outer tub and is abutted against the annular convex rib of the box body.
 15. The impeller-type washing machine according to claim 7, wherein the fixed support is provided with a groove at a position tangential to the outer tub for matching with the upper edge of the outer tub.
 16. The impeller-type washing machine according to claim 9, wherein at least two damping springs are arranged, an annular plate is arranged around a periphery of the stator of the motor, the damping springs are installed on the annular plate and uniformly distributed in one circumference centered on an axis of the motor.
 17. The impeller-type washing machine according to claim 11, wherein two ends of the damper are respectively in hinged connection with the installation plate and the bottom part of the box body; and
 18. The impeller-type washing machine according to claim 11, wherein at least two dampers are arranged, and uniformly installed on a circumference centered on an axis of the decelerating clutch device. 